SOLVING THE PROBLEM ON THE COUPLED FLUID–SOLID HEAT TRANSFER IN A ROTOR WITH A THERMAL RADIATION BOUNDARY CONDITION

A numerical model for the coupled fluid–solid heat transfer in a rotor with a thermal radiation boundary condition is proposed. The resulting 2D N–S equations with a Robin nonlinear boundary condition were solved numerically using the Newton iteration method based on a homotopy algorithm. The temperature distribution on the sidewall of the rotor was determined depending on the flow field and the temperature field in it. The data obtained show that the temperature distribution on the sidewall of the rotor is not linear, especially in the case of low thermal conductivity of the rotor materials. It was established that the relations between the drag coefficient of the scoops of the rotor and the average temperature on its sidewall and between the scoop drag coefficient and the maximum temperature difference on this sidewall are linear and that they are determined by the ambient temperature and the effective emissivity of the rotor surface. The model proposed allows one to numerically calculate the temperature distribution on the sidewall of a rotor with regard for the radiation boundary conditions.
A numerical model for the coupled fluid–solid heat transfer in a rotor with a thermal radiation boundary condition is proposed. The resulting 2D N–S equations with a Robin nonlinear boundary condition were solved numerically using the Newton iteration method based on a homotopy algorithm. The temperature distribution on the sidewall of the rotor was determined depending on the flow field and the temperature field in it. The data obtained show that the temperature distribution on the sidewall of the rotor is not linear, especially in the case of low thermal conductivity of the rotor materials. It was established that the relations between the drag coefficient of the scoops of the rotor and the average temperature on its sidewall and between the scoop drag coefficient and the maximum temperature difference on this sidewall are linear and that they are determined by the ambient temperature and the effective emissivity of the rotor surface. The model proposed allows one to numerically calculate the temperature distribution on the sidewall of a rotor with regard for the radiation boundary conditions. Автор:  Ming An and Shi Zeng
Ключевые слова:  coupled fluid–solid heat transfer, radiation boundary conditions, rotor
Стр:  1555